[Jeremy Garchow]"Curious, David Lawrence. What kind of footage are you playing back?"

Nothing too aggressive -- ProRes 422, XDCAM EX, and H.264, the kind of stuff I normally work with day-to-day. I have the same 4K Red sample footage as my bro and will fool around with it later today. His machine is a couple years newer than mine. He says he was playing full 4K source files, but at 1/8 resolution.

For my ProRes test I used this guide to set up an end-to-end workflow and was happy with the result: